JPH0614607U - Ball screw - Google Patents

Ball screw

Info

Publication number
JPH0614607U
JPH0614607U JP057467U JP5746792U JPH0614607U JP H0614607 U JPH0614607 U JP H0614607U JP 057467 U JP057467 U JP 057467U JP 5746792 U JP5746792 U JP 5746792U JP H0614607 U JPH0614607 U JP H0614607U
Authority
JP
Japan
Prior art keywords
screw
screw shaft
ball
ball screw
nut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP057467U
Other languages
Japanese (ja)
Inventor
誠治 武井
Original Assignee
日本トムソン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本トムソン株式会社 filed Critical 日本トムソン株式会社
Priority to JP057467U priority Critical patent/JPH0614607U/en
Priority to US08/090,264 priority patent/US5373754A/en
Publication of JPH0614607U publication Critical patent/JPH0614607U/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/632—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings
    • E05F15/652—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings operated by screw-and-nut mechanisms
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
    • E05F15/668—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings
    • E05F15/673—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings operated by screw-and-nut mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/696—Screw mechanisms
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19702—Screw and nut
    • Y10T74/19721—Thread geometry
    • Y10T74/19726—Thread pitch varies over axial length
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19702—Screw and nut
    • Y10T74/19744—Rolling element engaging thread
    • Y10T74/19781—Non-recirculating rolling elements
    • Y10T74/19786—Captured sphere

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

(57)【要約】 【目的】 送り機構として組み込まれるべき装置のコス
ト低減に寄与すると共に、作動させる物体、例えば自動
ドア等の作動態様を維持するための調整作業を不要とし
得るボールねじを提供すること。 【構成】 ねじ軸１のねじ部についてその一端から他端
までの間において、ねじピッチを変化させることによっ
て上記の効果を得た。 (57) [Abstract] [PROBLEMS] To provide a ball screw that contributes to cost reduction of a device to be incorporated as a feeding mechanism and that does not require adjustment work for maintaining an operating state of an object to be operated, for example, an automatic door. To do. [Structure] The above effect is obtained by changing the screw pitch between the one end and the other end of the screw portion of the screw shaft 1.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

本考案は、ボールねじに関し、特に自動ドアなどの送り機構用として好適なボ ールねじに関する。 The present invention relates to a ball screw, and particularly to a ball screw suitable for a feed mechanism such as an automatic door.

【０００２】[0002]

【従来の技術】[Prior art]

図４及び図５にこの種のボールねじの一例を示す。なお、当該ボールねじは、 例えば特公昭４４−１５２０６号公報において開示されている。 4 and 5 show an example of this type of ball screw. The ball screw is disclosed in, for example, Japanese Patent Publication No. 44-15206.

【０００３】 図において、ねじ軸１０は３条のものであり、ナット１１はねじ軸１０に遊嵌 している。ナット１１の内周部には環状溝１１ａが形成されており、該環状溝１ １ａ内にはねじ軸１０の条数と同数、すなわち３つのボール１２が配置されてお り、これらボール１２はねじ軸１０の３条のねじ溝１０ａ各々に対して１つずつ 係合している。In the figure, the screw shaft 10 has three threads, and the nut 11 is loosely fitted in the screw shaft 10. An annular groove 11a is formed on the inner peripheral portion of the nut 11, and the same number of threads as the screw shaft 10, that is, three balls 12 are arranged in the annular groove 11a. One is engaged with each of the three thread grooves 10a of the screw shaft 10.

【０００４】 上記した構成のボールねじは、例えば自動ドア装置においてドアの送り機構に 組み込まれて使用される。すなわち、ナット１１をドアに対して取り付け、ねじ 軸１０を固定側に設け、ねじ軸１０に対してモータよりのトルクを付与して回転 駆動することによりナット１１が進退し、ドアが開閉動作を行う。The ball screw having the above configuration is used by being incorporated in a door feeding mechanism in an automatic door device, for example. That is, the nut 11 is attached to the door, the screw shaft 10 is provided on the fixed side, and torque is applied from the motor to the screw shaft 10 to rotate and drive the nut 11 to move back and forth, thereby opening and closing the door. To do.

【０００５】 ところで、自動ドアに関しては、安全面などの観点から、その開閉ストローク の中間部分に比してその前後の部分において低速にて作動させることが行われて いる。この緩急動作は例えば、トルク発生用のモータとしてサーボモータ等を使 用し、該サーボモータの回転数を制御することによりなされる。By the way, from the viewpoint of safety and the like, the automatic door is operated at a lower speed in the front and rear portions of the opening and closing stroke thereof compared to the middle portion thereof. This slow-moving operation is performed, for example, by using a servomotor or the like as a motor for generating torque and controlling the rotation speed of the servomotor.

【０００６】[0006]

【考案が解決しようとする課題】[Problems to be solved by the device]

しかしながら、かかる構成においては、比較的高価なサーボモータ等を使用せ ねばならないと共に該モータの回転数制御のための制御回路を設ける必要がある ことからコストの増大を招来する一方、モータの回転ずれなどに起因してドアの 加減速点及び停止位置のずれを生じ易いが故にその調整を比較的頻繁に行わねば ならないという欠点がある。 However, in such a configuration, it is necessary to use a relatively expensive servo motor or the like and it is necessary to provide a control circuit for controlling the rotation speed of the motor. As a result, the door acceleration / deceleration point and the stop position are likely to deviate, so that the adjustment must be performed relatively frequently.

【０００７】 そこで、本考案は上記従来技術の欠点に鑑みてなされたものであって、送り機 構として組み込まれるべき装置のコスト低減に寄与すると共に、作動させる物体 、例えば自動ドア等の作動態様を維持するための調整作業を不要とし得るボール ねじを提供することを目的としている。Therefore, the present invention has been made in view of the above-mentioned drawbacks of the prior art, and contributes to cost reduction of a device to be incorporated as a feeder mechanism, and an operating mode of an object to be operated, for example, an automatic door. The purpose of the present invention is to provide a ball screw that can eliminate the need for adjustment work for maintaining

【０００８】[0008]

【課題を解決するための手段】[Means for Solving the Problems]

本考案は、ねじ軸と、内周部にその筒中心に対して垂直な面に沿うように環状 溝が形成されて前記ねじ軸に遊嵌したナットと、前記環状溝内に配置され且つ前 記ねじ軸のねじ溝に対して係合したボールとを備えたボールねじであって、前記 ねじ軸のねじ部がその一端から他端までの間においてねじピッチが変化せしめら れているように構成したものである。 According to the present invention, a screw shaft, an annular groove formed in an inner peripheral portion along a surface perpendicular to a center of the cylinder, a nut loosely fitted to the screw shaft, and a nut arranged in the annular groove and A ball screw having a ball engaged with a thread groove of a screw shaft, wherein the screw portion of the screw shaft has a thread pitch varying from one end to the other end. It is composed.

【０００９】[0009]

【実施例】【Example】

次に、本考案の実施例としてのボールねじについて、添付図面を参照しつつ説 明する。 Next, a ball screw as an embodiment of the present invention will be described with reference to the accompanying drawings.

【００１０】 図１において、ねじ軸１はこの場合２条のものであり、全長がＬのねじ部を有 している。そして、図２から明らかなようにナット２は略円筒状に形成され、ね じ軸１に遊嵌している。ナット２の内周部にはその筒中心に対して垂直な面に沿 うように例えば２条の環状溝２ａが所定のピッチＰ1 を以て形成されている。な お、ナット２の一端部にはフランジ部２ｃが形成されており、図２から明らかな ように、このフランジ部２ｃには座グリ部２ｄ及びねじ部挿通孔２ｅが例えば４ つ、等ピッチにて設けられている。後述するドアはこのフランジ部２ｃに締結さ れるのであり、これら座グリ部２ｄ及びねじ部挿通孔２ｅに、締結用ボルトの頭 部及びねじ部が挿通される。また、このナット２とドアとの結合手段としては、 かかるボルト締め形式の他、キー等を用いてもよい。In FIG. 1, the screw shaft 1 has two threads in this case, and has a screw portion with a total length of L. As is apparent from FIG. 2, the nut 2 is formed in a substantially cylindrical shape and is loosely fitted on the screw shaft 1. On the inner peripheral portion of the nut 2, for example, two annular grooves 2a are formed at a predetermined pitch P 1 along a surface perpendicular to the center of the cylinder. A flange portion 2c is formed at one end of the nut 2, and as is clear from FIG. 2, the flange portion 2c has four spot facing portions 2d and four screw portion insertion holes 2e, for example, at an equal pitch. It is provided in. The door described later is fastened to the flange portion 2c, and the head portion and the screw portion of the fastening bolt are inserted into the spot facing portion 2d and the screw portion insertion hole 2e. In addition to the bolt tightening method, a key or the like may be used as the coupling means for the nut 2 and the door.

【００１１】 なお、図３から明らかなように、これら環状溝２ａはその断面形状が例えば台 形状となっているが、ねじ軸１と同様に、この環状溝２ａはボール半径よりやや 大きい半径のボール軌道面を形成してもよい。また、上記のように、ナット２に 複数条の環状溝２ａを形成してその各々にねじ軸１の条数に等しいボール３を配 置したことにより、ねじ軸１とナット２との間に介在するボール３の数が多くな り、ねじ軸１に対するナット２の組み付け状態が安定している。As is apparent from FIG. 3, these annular grooves 2a have a trapezoidal sectional shape, but like the screw shaft 1, the annular grooves 2a have a radius slightly larger than the radius of the ball. A ball raceway surface may be formed. Further, as described above, by forming the plurality of annular grooves 2a in the nut 2 and disposing the balls 3 equal to the number of threads of the screw shaft 1 in each of them, the annular groove 2a is provided between the screw shaft 1 and the nut 2. Since the number of balls 3 interposed is large, the assembled state of the nut 2 to the screw shaft 1 is stable.

【００１２】 ナット２に形成された各環状溝２ａ内には、ねじ軸１の条数と同様、すなわち ２つずつのボール３が配置されており、これらボール３はねじ軸１の２条のねじ 溝１ａの各々に対して１つずつ係合している。なお、該ねじ溝１ａの形態につい ては、本実施例のように円弧状の他、三角状、台形状等、必要に応じて種々のも のを適用し得ることは言及するまでもない。In each annular groove 2 a formed in the nut 2, there are arranged balls 3 of the same number as the number of threads of the screw shaft 1, that is, two balls 3 each. One is engaged with each of the thread grooves 1a. Regarding the form of the thread groove 1a, it goes without saying that various shapes such as an arc shape like this embodiment, a triangular shape, a trapezoidal shape, etc. can be applied as required.

【００１３】 ここで、ねじ軸１のねじ部の形態について詳述する。Here, the form of the screw portion of the screw shaft 1 will be described in detail.

【００１４】 図１に示すように、全長Ｌのねじ部をその一端から他端にわたって５つの部分 Ｌ1 乃至Ｌ5 に分けると、夫々一端側及び他端側である長さＬ1 及びＬ5 の２つ の部分に形成されたねじ溝１ａはそのねじピッチが互いに同じであり、Ｐ2 とな っている。そして、中央部である長さＬ3 の部分に形成されたねじ溝１ａのねじ ピッチＰ3 が、両端部Ｌ1 及びＬ5 のねじピッチＰ2 に比して大きくなされてい る。なお、図示してはいないが、両端部Ｌ1 及びＬ5 と中央部Ｌ3 との間に位置 する長さＬ2 及びＬ4 の部分においては、上記のねじピッチＰ2 からＰ3 へ、ま た、Ｐ3 からＰ2 へと連続せしめるべく、該長さＬ2 、Ｌ4 の各々の一端から他 端までの間においてねじピッチが漸次増減するように形成されている。As shown in FIG. 1, when the threaded portion having the entire length L is divided into five parts L 1 to L 5 from one end to the other end, the lengths L 1 and L 5 which are the one end side and the other end side, respectively. the screw groove 1a formed in two parts of the same the screw pitch from each other, it is I Do and P 2. Then, the screw groove 1a thread pitch P 3 of which is formed in a portion of the length L 3 which is a central portion, that have been made larger than the thread pitch P 2 of the opposite end portions L 1 and L 5. Although not shown, at the portions of length L 2 and L 4 located between both end portions L 1 and L 5 and the central portion L 3 , from the above-mentioned screw pitch P 2 to P 3 , Further, in order to continue from P 3 to P 2 , the thread pitch is formed so as to gradually increase or decrease between one end and the other end of each of the lengths L 2 and L 4 .

【００１５】 上記した構成のボールねじを、例えば自動ドア装置におけるドアの送り機構に 組み込んで用いた場合、以下のような動作を行う。When the ball screw having the above-described configuration is used by being incorporated in a door feeding mechanism of an automatic door device, for example, the following operation is performed.

【００１６】 すなわち、ねじ軸１がモータ（図示せず）により等速にて回転駆動されると、 ドアはその初動時において、ねじ軸１の長さＬ1 の部分の作用により比較的低速 にて作動する。そして、Ｌ2 の部分において加速され、Ｌ3 の部分により早送り される。その後、Ｌ4 の部分により減速され、Ｌ5 の部分によって低速駆動され 、閉または開動作を完了する。That is, when the screw shaft 1 is rotationally driven at a constant speed by a motor (not shown), the door moves at a relatively low speed due to the action of the portion having the length L 1 of the screw shaft 1 at the initial movement of the door. Works. Then, it is accelerated in the portion L 2 and fast-forwarded by the portion L 3 . Then, it is decelerated by the portion of L 4 and driven at a low speed by the portion of L 5 to complete the closing or opening operation.

【００１７】 なお、ねじ軸１のねじピッチの変化の態様については、上記の如き構成に限ら ず、他に種々の構成を採用し得るものであり、組み付けられる装置に関しても自 動ドアに限定するものではない。The manner in which the screw pitch of the screw shaft 1 changes is not limited to the above-described configuration, and various other configurations can be adopted, and the assembled device is also limited to the automatic door. Not a thing.

【００１８】 また、上記の実施例においては、ねじ軸１が２条ねじとなっているが、本発明 は３条以上のねじ軸を有するボールねじにも適用し得ることは勿論である。Further, in the above embodiment, the screw shaft 1 is a double-thread screw, but the present invention can of course be applied to a ball screw having three or more screw shafts.

【００１９】 更に、図示はしないが、ねじ軸１を１条ねじとしてもよい。但し、この場合、 ねじ軸１に対するナット２の組み付け状態を安定化させるために、ナット２の環 状溝２ａは所定ピッチＰ1 を以て複数条、好ましくは３条形成して該各環状溝２ ａ内にボール３を配置することが必要である。Further, although not shown, the screw shaft 1 may be a single thread screw. However, in this case, in order to stabilize the assembled state of the nut 2 with respect to the screw shaft 1, the annular groove 2a of the nut 2 is formed in a plurality of rows, preferably three rows with a predetermined pitch P 1 , and each annular groove 2a is formed. It is necessary to place the ball 3 inside.

【００２０】 また、図１に示したボールねじは１枚のドアが開閉動作をなす片開き自動ドア の送り機構として組み込まれるものであるが、２枚のドアが相対的に開閉する両 開き自動ドアの送り機構用として好適なボールねじとして下記の構成（図示せず ）が挙げられる。The ball screw shown in FIG. 1 is incorporated as a feed mechanism of a single-opening automatic door in which one door opens and closes. The following structure (not shown) can be given as a ball screw suitable for a door feeding mechanism.

【００２１】 すなわち、略中央部を境としてその一方側に図１において長さＬにて示した部 分と同様の右ねじ部を有すると共に、他方側に該右ねじ部とは対称形状の左ねじ 部を有するねじ軸を形成する。そして、これら右ねじ部及び左ねじ部の夫々に対 してナットを配置するのである。That is, while having a right-hand threaded portion similar to the portion indicated by the length L in FIG. 1 on one side of the substantially central portion as a boundary, the left-hand side of the other side is symmetrical with the right-handed threaded portion. A screw shaft having a screw portion is formed. Then, the nuts are arranged for the right-hand thread portion and the left-hand thread portion, respectively.

【００２２】[0022]

【考案の効果】[Effect of device]

以上説明したように、本考案によれば、ねじ軸のねじ部がその一端から他端ま での間においてねじピッチが変化せしめられているが故に、物体の緩急駆動のた めに高価なサーボモータを用いる必要がなく、かつ制御回路によって回転制御を 行う必要もないことから、コストの低減に寄与するという効果がある。 また、本考案によるボールねじを使用すれば、自動ドア等の作動態様はねじ軸 のねじピッチの変化の態様によってのみ左右され、モータの回転ずれなどに起因 するドアの位置ずれが生ずる懸念がなく、調整を頻繁に行う必要がないという効 果がある。 As described above, according to the present invention, since the screw pitch of the screw part of the screw shaft is changed from one end to the other end, an expensive servo is required to drive the object slowly. Since there is no need to use a motor and no rotation control is required by the control circuit, there is an effect of contributing to cost reduction. Further, when the ball screw according to the present invention is used, the operation mode of an automatic door or the like is influenced only by the mode of change of the screw pitch of the screw shaft, and there is no concern that the position of the door will be displaced due to the rotational displacement of the motor. The effect is that it is not necessary to make frequent adjustments.

【図面の簡単な説明】[Brief description of drawings]

【図１】図１は、本考案の実施例としてのボールねじの
一部断面を含む正面図である。FIG. 1 is a front view including a partial cross section of a ball screw as an embodiment of the present invention.

【図２】図２は、図１に関するＡ−Ａ矢視図である。FIG. 2 is a view taken along the line AA of FIG.

【図３】図３は、図１及び図２に示したボールねじが具
備するナットの縦断面図である。FIG. 3 is a vertical cross-sectional view of a nut included in the ball screw shown in FIGS. 1 and 2.

【図４】図４は、従来のボールねじの一部断面を含む正
面図である。FIG. 4 is a front view including a partial cross section of a conventional ball screw.

【図５】図５は、図４に関するＢ−Ｂ断面図である。5 is a sectional view taken along line BB in FIG.

【符号の説明】[Explanation of symbols]

１ ねじ軸 １ａ ねじ溝 ２ ナット ２ａ 環状溝 ３ ボール 1 Screw Shaft 1a Screw Groove 2 Nut 2a Annular Groove 3 Ball

Claims (5)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 ねじ軸と、内周部にその筒中心に対して
垂直な面に沿うように環状溝が形成されて前記ねじ軸に
遊嵌したナットと、前記環状溝内に配置され且つ前記ね
じ軸のねじ溝に対して係合したボールとを備えたボール
ねじであって、前記ねじ軸のねじ部がその一端から他端
までの間においてねじピッチが変化せしめられているこ
とを特徴とするボールねじ。1. A screw shaft, a nut formed in an inner peripheral portion along an axis perpendicular to a cylinder center of the screw shaft, and a nut loosely fitted to the screw shaft, and arranged in the annular groove. A ball screw having a ball engaged with a thread groove of the screw shaft, wherein a screw pitch of the screw part of the screw shaft is changed from one end to the other end. And a ball screw. 【請求項２】 前記ねじ軸は多条ねじであり、前記ボー
ルは前記環状溝内に前記ねじ軸の条数と同数配置されか
つ前記ねじ軸のねじ溝各々に対して１つずつ係合してい
ることを特徴とする請求項１記載のボールねじ。2. The screw shaft is a multi-thread screw, the balls are arranged in the annular groove in the same number as the number of threads of the screw shaft, and one ball is engaged with each screw groove of the screw shaft. The ball screw according to claim 1, wherein: 【請求項３】 前記環状溝が、所定ピッチを以て複数並
設されていることを特徴とする請求項２記載のボールね
じ。3. The ball screw according to claim 2, wherein a plurality of the annular grooves are arranged side by side with a predetermined pitch. 【請求項４】 前記ねじ軸は１条ねじであり、前記環状
溝が所定ピッチを以て少なくとも３条並設されているこ
とを特徴とする請求項１記載のボールねじ。4. The ball screw according to claim 1, wherein the screw shaft is a single-thread screw, and the annular grooves are arranged in parallel at least three threads at a predetermined pitch. 【請求項５】 前記ねじ部は、前記ねじ軸の略中央部を
境として形成された右ねじ部及び左ねじ部であることを
特徴とする請求項１乃至請求項４のうちいずれか１記載
のボールねじ。5. The threaded portion is a right-handed threaded portion and a left-handed threaded portion that are formed with a substantially central portion of the screw shaft as a boundary, and any one of claims 1 to 4 is provided. Ball screw.
JP057467U 1992-07-24 1992-07-24 Ball screw Pending JPH0614607U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP057467U JPH0614607U (en) 1992-07-24 1992-07-24 Ball screw
US08/090,264 US5373754A (en) 1992-07-24 1993-07-13 Ball screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP057467U JPH0614607U (en) 1992-07-24 1992-07-24 Ball screw

Publications (1)

Publication Number Publication Date
JPH0614607U true JPH0614607U (en) 1994-02-25

Family

ID=13056497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP057467U Pending JPH0614607U (en) 1992-07-24 1992-07-24 Ball screw

Country Status (2)

Country Link
US (1) US5373754A (en)
JP (1) JPH0614607U (en)

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JPH08114258A (en) * 1994-10-17 1996-05-07 Sankyo Seiki Mfg Co Ltd Multithread screw
JP2006257805A (en) * 2005-03-18 2006-09-28 Toshiba Elevator Co Ltd Opening/closing mechanism of door
KR100947804B1 (en) * 2002-02-18 2010-03-15 가부시키가이샤 시마노 Device for transferring Screw and Reel Sheet having the same
JP2012503161A (en) * 2008-09-23 2012-02-02 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Screw transmission device
WO2022234653A1 (en) * 2021-05-07 2022-11-10 株式会社ハイテム Combination structure of belt conveyor and shutter device, and shutter device

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DE10307308B4 (en) * 2003-02-20 2006-11-30 Siemens Ag Device for the linear method of a useful mass
DE102004046546A1 (en) * 2004-09-20 2006-03-23 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh Drive device for entry and exit devices, in particular for doors of rail vehicles
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JPS63158351A (en) * 1986-12-18 1988-07-01 Hitachi Electronics Eng Co Ltd Lead screw

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08114258A (en) * 1994-10-17 1996-05-07 Sankyo Seiki Mfg Co Ltd Multithread screw
KR100947804B1 (en) * 2002-02-18 2010-03-15 가부시키가이샤 시마노 Device for transferring Screw and Reel Sheet having the same
JP2006257805A (en) * 2005-03-18 2006-09-28 Toshiba Elevator Co Ltd Opening/closing mechanism of door
JP2012503161A (en) * 2008-09-23 2012-02-02 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング Screw transmission device
WO2022234653A1 (en) * 2021-05-07 2022-11-10 株式会社ハイテム Combination structure of belt conveyor and shutter device, and shutter device

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